Subtract 21/45 from 45/10
1st number: 4 5/10, 2nd number: 21/45
45/10 - 21/45 is 121/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
45/10 = 45 × 9/10 × 9 = 405/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Subtract the two like fractions:
405/90 - 42/90 = 405 - 42/90 = 363/90 - After reducing the fraction, the answer is 121/30
- In mixed form: 41/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10-21/45 45/10-42/45 45/20-21/45 45/10-21/90 45/10-63/45 45/30-21/45 45/50-21/45 45/70-21/45